Malicious PDF — malware analysis report

Static analysis result for SHA-256 589c8145c7e40aa4…

MALICIOUS

PDF

67.9 KB Created: 2021-09-04 15:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d7476d4dc47ad3018e0a5fa0dca785ee SHA-1: 153446bdb06f941172094cf146abb1e5c36c51aa SHA-256: 589c8145c7e40aa40617e2bd14d7fb9f2baf18ed31ce70083dabe27a651796a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to direct users to malicious content. The PDF's structure and embedded links are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fluitec.fr/ressource/site-image/files/mepimifezibepeluduz.pdf In PDF document text
    • http://aliceinformaticasrl.com/user/pages/puxumejakizimezudaxojoku.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/95631018204.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1c237fdf0bc528870feed8d34e3e2d23/27202488820.pdfIn PDF document text
    • https://egca.fr/userfiles/file/wefusokirajejeriw.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/latifijewofuliru.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/327817695.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/kawipubelatitisufife.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/10341566717.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/pimowaw.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/datasesozutipeb.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/044bba577f5e1319088cc956121ff58e/resolikagudilizokavefakef.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b802a534d---41165052928.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/32843263532.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/watibisafofimozoj.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/wiwaligema.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/51312298703.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/11409181673.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/93636502275.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/kewileral.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/8f8404693479d1b3a036f966d1a56d10/94136747515.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/mogafuwenutidegomedezek.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bf49c85e9---berupixuw.pdfIn PDF document text
    • https://filetorme.com/upload/files/lovuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=from+pdf+to+word+convertPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 10440 bytes
SHA-256: dcffb03a31db83c881fcbfc39e8b4e37f4c4fa260a1bb2b3ec3b0f7db8ed0670